Packaging Material

ABSTRACT

Disclosed is a packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising: a fitting-in concave portion to fit a predetermined object to be packaged therein, the fitting-in concave portion being formed by being surrounded by the angular cylindrical structures; an opening portion to house a first accessory inside the packaging material, the opening portion being formed by folding a surrounding end piece of an opening formed by cutting out a portion of one surface of the packaging material, toward an inside of the packaging material; and a notch-shaped concave portion to house a second accessory, the notch-shaped concave portion being formed by concaving one of convex angle portions of the packaging material toward the inside.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a packaging material and more particularly, to a packaging material used when an object to be packaged is stored in a storage box.

2. Description of Related Art

Conventionally, a technique is known in which a buffer material on which commodity joining holes which differ in size and shape are formed, is used and those commodity joining holes are selectively applied so that commodities which differ in size are stored in and packaged by an outer box (for example, see Japanese Patent Application Laid Open Publication No. 8-324648).

Further, a packaging material is known, in which a first perforation to embed a CD case and a DVD case; a second perforation to embed an MD disc; and a third perforation to embed an MO disc are respectively provided on a predetermined surface of a corrugated cardboard which can be folded. Discs are embedded in a perforation portion corresponding to the disc to be packaged, and the corrugated cardboard is folded, so that each of the discs which differ in size can be packaged (for example, see Japanese Registered Utility Model Publication No. 3100325).

However, in the cases of the above described conventional techniques, although objects to be packaged which differ in size can be packaged individually, it was difficult to package two or more kinds of objects to be packaged together and to package each of the objects to be packaged so as to be protected from impact and vibration.

SUMMARY OF THE INVENTION

It is, therefore, a main object of the present invention is to provide a packaging material which can preferably package two or more kinds of objects to be packaged.

According to a first aspect of the present invention, there is provided a packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising:

a fitting-in concave portion to fit a predetermined object to be packaged therein, the fitting-in concave portion being formed by being surrounded by the angular cylindrical structures;

an opening portion to house a first accessory inside the packaging material, the opening portion being formed by folding a surrounding end piece of an opening formed by cutting out a portion of one surface of the packaging material, toward an inside of the packaging material; and

a notch-shaped concave portion to house a second accessory, the notch-shaped concave portion being formed by concaving one of convex angle portions of the packaging material toward the inside.

According to a second aspect of the present invention, there is provided a packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising:

a fitting-in concave portion to fit a predetermined object to be packaged therein;

an opening portion to house a first accessory inside the packaging material, the opening portion being formed in one surface of the packaging material; and

a notch-shaped concave portion to house a second accessory, which is formed in one of angle portions of the packaging material.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, advantages and features of the present invention will become more fully understood from the detailed description given hereinbelow and the appended drawings which are given by way of illustration only, and thus are not intended as a definition of the limits of the present invention, and wherein:

FIG. 1 is an exploded perspective diagram showing a state in which a battery charger is stored in a wrapping box by using a top pad according to the present invention;

FIG. 2 is an exploded perspective diagram showing a state in which a battery charger is stored in the wrapping box by using the top pad according to the present invention;

FIG. 3 is an expanded diagram showing a state before the top pad is folded up;

FIG. 4 is an expanded diagram showing a state before a bottom pad is folded up;

FIG. 5 is a perspective diagram showing the top pad in a state in which an opening portion is used;

FIG. 6 is a perspective diagram showing the top pad in a state in which a notch-shaped concave portion is used;

FIGS. 7A to 7D are explanatory diagrams showing the steps of folding and building up the top pad, FIG. 7A shows the step of folding a front board portion, FIG. 7B shows the step of folding a rear board portion, FIG. 7C shows the step of folding a left board portion and a right board portion, and FIG. 7D shows the completed top pad; and

FIG. 8 is an enlarged diagram showing the completed top pad.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Hereinbelow, an embodiment of the packaging material according to the present invention will be described in detail with reference to the drawings.

In the present embodiment, a packaging material which is used when a battery charger which is a predetermined object to be packaged is packaged in a wrapping box is described. Further, the battery charger is sandwiched by a pair of upper and lower packaging materials, and the battery charger is stored in the wrapping box integrally with the packaging material.

Incidentally, the scope of the invention is not limited to the drawn examples.

As shown in FIGS. 1 and 2, a pair of upper and lower packaging materials comprise a top pad 1 arranged so as to cover an upper portion of the battery charger C which is sealed inside a transparent bag made of resin; and a bottom pad 2 arranged so as to support a lower portion of the battery charger C. The battery charger C is sandwiched by the top pad 1 and the bottom pad 2, to store and package the battery charger C in the wrapping box B.

As shown in FIG. 3, the top pad 1 comprises a three-dimensional structure built up by folding one piece of corrugated cardboard. As shown in FIG. 4, the bottom pad 2 comprises a three-dimensional structure built up by folding one piece of corrugated cardboard.

Further, on a lower surface side of the top pad 1, a fitting-in concave portion 1 c (see FIG. 7D) is provided to fit the upper portion of the battery charger C therein, and on an upper surface side of the bottom pad 2, a fitting-in concave portion 2 c is provided to fit the lower portion of the battery charger C therein. Thus, the battery charger C which is sandwiched by the top pad 1 and the bottom pad 2, is stored in a wrapping box B without shaking the battery charger C.

Incidentally, the technique of the packaging material according to the present invention is described by applying the technique to the top pad 1 in the present embodiment.

As shown in FIGS. 1 and 5, the top pad 1 comprises an opening portion 1 a to house a small box 3 in which an accessory adapter A1 which is a first accessory is stored, in an inner portion of the top pad 1. The accessory adapter A1 can be packaged in the wrapping box B with the battery charger C.

Further, as shown in FIGS. 2 and 6, the top pad 1 comprises a notch-shaped concave portion 1 b to house an accessory cable A2 which is a second accessory. The accessory cable A2 can be packaged in the wrapping box B with the battery charger C.

Further, as shown in FIG. 3, an expanded state of the top pad 1 comprises an upper surface portion 10; a front board portion 11 extended in a front direction which is one side of the upper surface portion 10; a rear board portion 12 extended in a rear direction which is the other side of the upper surface portion 10; a left board portion 13 extended in a left direction of the upper surface portion 10; and a right board portion 14 extended in a right direction of the upper surface portion 10.

The upper surface portion 10 is a board surface portion which is to be the upper surface of the packaging material when the top pad 1 is used as the packaging material.

As shown in FIG. 3, a slit portion S1 is formed in between the upper surface portion 10 and the front board portion 11, on a front end side of the upper surface portion 10. Further, a perforation 10 a which includes the slit portion S1 as one portion and has a substantially rectangular shape with two diagonal lines which are outwardly extended from two of the angles of the rectangular shape, which are opposed to the slit portion S1, respectively, on the upper surface portion 10.

The opening portion 1 a is formed at the position where the slit portion S1 and the perforation 10 a are provided.

Further, a slit portion S2 is formed on a rear board portion 12 side of the upper surface portion 10.

As shown in FIG. 3, the front board portion 11 comprises five surface portions 11 a, 11 b, 11 c, 11 d, and 11 e, divided by fold lines.

Further, a pair of slit portions S3 is formed perpendicular to a fold line from the second surface portion 11 b to the third surface portion 11 c, and a pair of slit portions S4 is formed perpendicular to a fold line on the fourth surface portion 11 d.

Moreover, at a left end of the fourth surface portion 11 d, a left end piece 114L is extended through a fold line, and at a right end of the fourth surface portion 11 d, a right end piece 114R is extended through a fold line.

Moreover, at a free end side of the fifth surface portion 11 e, a front nail portion 115 is formed.

As shown in FIG. 3, the rear board portion 12 comprises three surface portions 12 a, 12 b, and 12 c, divided by fold lines.

Further, a pair of slit portions S5 is formed perpendicular to a fold line from the second surface portion 12 b to the third surface portion 12 c.

Moreover, at a free end side of the third surface portion 12 c, a rear nail portion 123 is formed.

As shown in FIG. 3, the left board portion 13 comprises three surface portions 13 a, 13 b, and 13 c, divided by fold lines.

Further, at a free end side of the third surface portion 13 c, a large nail portion 133 a, a medium nail portion 133 b, and a small nail portion 133 c having a large, a medium, and a small size, respectively are formed.

As shown in FIG. 3, the right board portion 14 comprises five surface portions 14 a, 14 b, 14 c, 14 d, and 14 e, divided by fold lines.

Further, at a free end side of the fifth surface portion 14 e, a large nail portion 145 a, a medium nail portion 145 b, and a small nail portion 145 c having a large, a medium, and a small size, respectively are formed.

Next, the steps of building up the top pad 1 three-dimensionally are described.

As shown in FIG. 7A, first, the front board portion 11 of the top pad 1 is folded along a fold line to be folded back to the upper surface portion 10 side.

Further, the front nail portion 115 of the fifth surface portion 11 e is inserted into the slit portion S2 of the upper surface portion 10 to fix the front board portion 11 to the upper surface portion 10 so that a form of an angular cylindrical structure formed by the front board portion 11 being folded is maintained.

Incidentally, the fold line in between the third surface portion 11 c and the fourth surface portion 11 d is made by a mountain fold, and the other fold lines are made by a valley fold.

Next, as shown in FIG. 7B, the rear board portion 12 of the top pad 1 is folded by a valley fold along a fold line to be folded back to the upper surface portion 10 side.

Further, the rear nail portion 123 of the third surface portion 12 c is inserted into the slit portion S2 of the upper surface portion 10 to fix the rear board portion 12 to the upper surface portion 10 so that a form of an angular cylindrical structure formed by the rear board portion 12 being folded is maintained.

Incidentally, in this state, the fifth surface portion 11 e of the front board portion 11 and the third surface portion 12 c of the rear board portion 12 are overlapped to each other to be arranged substantially perpendicular to the upper surface portion 10.

Next, as shown in FIG. 7C, the left board portion 13 is folded by a valley fold along a fold line to be folded back to the upper surface portion 10 side.

Further, the large nail portion 133 a and the medium nail portion 133 b of the third surface portion 13 c are respectively inserted into the slit portion S3 and the slit portion S4 of the front board portion 11, and the small nail portion 133 c of the third surface portion 13 c is inserted into the slit portion S5 of the rear board portion 12, so that a form of an angular cylindrical structure formed by the left board portion 13 being folded is maintained.

As shown in FIG. 7C, in the same manner, the right board portion 14 is folded by a valley fold along a fold line to be folded back to the upper surface portion 10 side. Incidentally, in this state, the fold line in between the upper surface portion 10 and the first surface portion 14 a, and the fold line in between the second surface portion 14 b and the third surface portion 14 c, are not folded.

Further, the large nail portion 145 a and the medium nail portion 145 b of the fifth surface portion 14 e are respectively inserted into the slit portion S3 and the slit portion S4 of the front board portion 11, and the small nail portion 145 c of the fifth surface portion 14 e is inserted into the slit portion S5 of the rear board portion 12, so that a form of an angular cylindrical structure formed by the right board portion 14 being folded is maintained.

Further, as shown in FIG. 7D, a fitting-in concave portion 1 c is formed on the lower surface side of the built up top pad 1, so as to be surrounded by the third surface portion 11 c and the fourth surface portion 11 d of the front board portion 11; the third surface portion 12 c of the rear board portion 12; the third surface portion 13 c (the medium nail portion 133 b) of the left board portion 13; and the fifth surface portion 14 e (the medium nail portion 145 b) of the right board portion 14.

Especially, the fitting-in concave portion 1 c is surrounded by the angular cylindrical structures in four directions, and the object to be packaged such as the battery charger C, housed in the fitting-in concave portion 1 c, can be housed so as to be protected from impact and vibration from outside. Incidentally, the fourth surface portion 11 d of the front board portion 11 which configures the fitting-in concave portion 1 c is positioned apart from the upper surface portion 10, and there is a space in between the fourth surface portion 11 d and the upper surface portion 10. Thus, the object to be packaged such as the battery charger C, housed in the fitting-in concave portion 1 c, can be housed so as to be protected more preferably.

Incidentally, as shown in FIG. 7D, the normal posture of the top pad 1 is a state in which the built up top pad 1 is reversed.

Further, in the top pad 1 shown in FIG. 8, the corrugated cardboard material is cut up along the perforation 10 a on the upper surface portion 10 which is to be the upper surface of the top pad 1. A rectangular piece 100 which is a portion of the upper surface portion 10 is cut out to form an opening having a rectangular shape. The three surrounding end pieces 101, 102, and 103 which form a verge of the opening are folded toward the inside of the top pad 1. Thus, as shown in FIG. 5, the opening portion 1 a to house the small box 3 in which the accessory adapter A1 is stored on one of the surfaces of the top pad 1 can be formed.

The three-dimensional shape of the top pad 1 comprises a plurality of angular cylindrical structures built up by folding corrugated cardboard materials. Especially, some of the angular cylindrical structures are built up so as to intersect substantially perpendicularly to each other, and when a strong force is applied to the top pad 1, it is difficult for the top pad 1 to be deformed. Thus, the internal space of the top pad 1 is to be preferably maintained.

That is to say, the small box 3 which is housed inside the top pad 1 through the opening portion 1 a and the contents (for example, the accessory adapter A1) of the small box 3, can be protected from impact and vibration from outside of the top pad 1.

Further, in the verge of the opening portion 1 a, three surrounding end pieces 101, 102, and 103 which are folded toward the inside of the top pad 1 are provided, and the small box 3 which is put inside the top pad 1 through the opening portion 1 a is preferably guided inside by the surrounding end pieces 101, 102, and 103. Moreover, the small box 3 is retained by the surrounding end pieces 101, 102, and 103 which are contacted to the surface of the small box 3, and it is easy for the posture of the small box 3 to be stabilized.

Further, as shown in FIG. 8, a convex angle portion formed by the upper surface portion 10 and the right board portion 14 of the top pad 1 is concaved toward the inside, and the notch-shaped concave portion 1 b to house the accessory cable A2 at one of the angle portions of the top pad 1 can be formed, as shown in FIG. 6.

Specifically, the notch-shaped concave portion 1 b is formed in the manner described below. That is, the fold line in between the upper surface portion 10 and the first surface portion 14 a of the right board portion 14, and the fold line in between the second surface portion 14 b and the third surface portion 14 c of the right board portion 14, are respectively folded by a valley fold. Further, the fold line in between the first surface portion 14 a and the second surface portion 14 b of the right board portion 14 is folded by a mountain fold.

The three-dimensional shape of the top pad 1 comprises a plurality of angular cylindrical structures built up by folding corrugated cardboard materials. Especially, some of the angular cylindrical structures are built up so as to intersect substantially perpendicularly to each other, and the top pad 1 comprises a stabled structure. Thus, the three-dimensional shape of the top pad 1 is to be preferably maintained.

That is to say, the space of the notch-shaped concave portion 1 b formed at the angle portion of the top pad 1 is preferably maintained, and the object to be packaged such as accessories and the like (for example, the accessory cable A2) can be housed in the notch-shaped concave portion 1 b so as to be protected.

The battery charger C can be sandwiched from above and below by the top pad 1 formed by being built in the above described manner, and the bottom pad 2 which is three-dimensionally built up in the same manner.

Incidentally, as shown in FIG. 4, an expanded state of the bottom pad 2 comprises a bottom surface portion 20; a front board portion 21 extended in a front direction which is one side of the bottom surface portion 20; a rear board portion 22 extended in a rear direction which is the other side of the bottom surface portion 20; a left board portion 23 extended in a left direction of the bottom surface portion 20; and a right board portion 24 extended in a right direction of the bottom surface portion 20.

Further, building up the bottom pad 2 by respectively folding the front board portion 21; the rear board portion 22; the left board portion 23; and the right board portion 24, along the fold lines, is almost the same as that in the top pad 1. Further, the three-dimensional structure of the bottom pad 2, composed of a plurality of angular cylindrical structures is similar to that of the top pad 1. Thus, the description of the building up and the structure of the bottom pad 2 is omitted.

In this manner, the top pad 1 and the bottom pad 2 which are a pair of top and bottom packaging materials comprise a plurality of angular cylindrical structures built up by folding the corrugated cardboard materials. Especially, some of the angular cylindrical structures are built up so as to intersect substantially perpendicularly to each other, and the top pad 1 and the bottom pad 2 comprise preferable buffering effect and impact resistance by the angular cylindrical structures.

That is to say, the battery charger C which is sandwiched by the top pad 1 and the bottom pad 2, and stored in and packaged by the wrapping box B with the top pad 1 and the bottom pad 2, can be protected from impact and vibration from the outside of the wrapping box B.

Especially, the top pad 1 can house the small box 3 so as to be protected, in which the accessory adapter A1 is stored, inside the top pad 1 through the opening portion 1 a. Thus when the top pad 1 is used, two kinds of objects to be packaged which are the battery charger C and the accessory adapter A1, can preferably be packaged together in the wrapping box B.

Further, the top pad 1 can house the accessory cable A2 so as to be protected, in the notch-shaped concave portion 1 b. Thus, when the top pad 1 is used, two kinds of objects to be packaged which are the battery charger C and the accessory cable A2, can preferably be packaged together in the wrapping box B.

Further, when the battery charger C is stored in and packaged by the wrapping box B, by the top pad 1 and the bottom pad 2, the small box 3 in which the accessory adapter A1 is stored is housed inside of the top pad 1 through the opening portion 1 a, and the accessory cable A2 is housed in the notch-shaped concave portion 1 b. Thus, three kinds of objects to be packaged which are the battery charger C, the accessory adapter A1, and the accessory cable A2, can preferably be packaged together in the wrapping box B.

Accordingly, the top pad 1 according to the embodiment of the present invention can be referred to as a packaging material which can preferably package two or more kinds of objects to be packaged.

Incidentally, in the embodiment described above, the packaging material according to the present invention is applied to the top pad 1. However, the present invention is not limited to this, and the packaging material according to the present invention can also be applied to the bottom pad 2.

Further, it is not limited to applying the packaging material according to the present invention to a top-bottom pair of the top pad 1 and the bottom pad 2, but the packaging material can also be applied to a left-right pair of side pads which sandwich the object to be packaged from right and left; and a front-rear pair of side pads which sandwich the object to be packaged from front and back.

Further, the angular cylindrical structure can take any shape, as long as it is a tube structure with a pointy shape, in which the folded corrugated cardboard materials have at least three surfaces, and a space is ensured inside thereof by the corrugated cardboard materials.

Further, specific detailed structures and the like can also appropriately be modified in all reason.

According to a first aspect of the preferred embodiment of the present invention, there is provided a packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising:

a fitting-in concave portion to fit a predetermined object to be packaged therein, the fitting-in concave portion being formed by being surrounded by the angular cylindrical structures;

an opening portion to house a first accessory inside the packaging material, the opening portion being formed by folding a surrounding end piece of an opening formed by cutting out a portion of one surface of the packaging material, toward an inside of the packaging material; and

a notch-shaped concave portion to house a second accessory, the notch-shaped concave portion being formed by concaving one of convex angle portions of the packaging material toward the inside.

According to a first aspect of the preferred embodiment of the present invention, the packaging material comprises a plurality of angular cylindrical structures built up by folding a piece of the corrugated cardboard materials. Thus, the packaging material is provided with a preferable buffering effect and impact resistance by these angular cylindrical structures. Incidentally, the angular cylindrical structure is for example, a tube structure with a pointy shape, in which the folded corrugated cardboard materials form four surfaces, and a space is ensured inside the four surfaces.

Further, the packaging material comprises a fitting-in concave portion formed by being surrounded by the angular cylindrical structures in four directions, to fit a predetermined object to be packaged therein. The object to be packaged is sandwiched by the packaging material so that the object to be packaged is fit into the fitting-in concave portion, and the object to be packaged is stored in and packaged by a predetermined storage box (a wrapping box) with the packaging material. Thus, the object to be packaged can be protected from impact and vibration from outside of the storage box.

Especially, the packaging material comprises an opening portion to house a first accessory inside the packaging material, formed in one of the surfaces of the packaging material; and a notch-shaped concave portion to house a second accessory, formed in one of the angle portions of the packaging material. Thus, two kinds of objects which are the object to be packaged and the first accessory; two kinds of objects which are the object to be packaged and the second accessory; and three kinds of objects which are the object to be packaged, the first accessory, and the second accessory, can respectively be packaged together, by the packaging material.

That is to say, by the packaging material which comprises a stable structure, the object to be packaged, the first accessory, and the second accessory can respectively be packaged preferably. Thus, the packaging material can be used as one which can package two or more kinds of objects to be packaged preferably.

Further, the opening portion of the packaging material is formed so that the surrounding end piece of an opening formed by cutting out a portion of one of the surfaces of the packaging material, is folded toward inside of the packaging material. Thus, the first accessory which is housed inside of the packaging material from the opening portion, is preferably guided inside the packaging material along the surrounding end piece folded toward inside, and the first accessory is retained by the surrounding end piece contacted to the surface of the first accessory. Therefore, the posture of the first accessory in the opening portion can be stabilized, and the object to be packaged such as the first accessory and the like can preferably be housed inside the packaging material.

Further, the notch-shaped concave portion of the packaging material is formed so that one of the convex angle portions of the packaging material is concaved toward inside, and it is easy for the notch-shaped concave portion to be formed.

Especially, the packaging material comprises a plurality of angular cylindrical structures built up by folding the corrugated cardboard material, and has a stabled three-dimensional structure. Thus, the three-dimensional shape of the packaging material is to be preferably maintained. Further, the space of the notch-shaped concave portion formed in the angle portion of the packaging material is preferably maintained with the three-dimensional shape of the packaging material, and the object to be packaged such as the second accessory can be housed in the notch-shaped concave portion so as to be protected.

According to a second aspect of the preferred embodiment of the present invention, there is provided a packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising:

a fitting-in concave portion to fit a predetermined object to be packaged therein;

an opening portion to house a first accessory inside the packaging material, the opening portion being formed in one surface of the packaging material; and

a notch-shaped concave portion to house a second accessory, which is formed in one of angle portions of the packaging material.

According to a second aspect of the preferred embodiment of the present invention, the packaging material comprises a plurality of angular cylindrical structures built up by folding a piece of the corrugated cardboard material. Thus the packaging material is provided with a preferable buffering effect and impact resistance by these angular cylindrical structures. Incidentally, the angular cylindrical structure is for example, a tube structure with a pointy shape, in which the folded corrugated cardboard materials form four surfaces, and a space is ensured inside the four surfaces.

Further, the packaging material comprises a fitting-in concave portion to fit a predetermined object to be packaged therein. The object to be packaged is sandwiched by the packaging material so that the object to be packaged is fit into the fitting-in concave portion, and the object to be packaged is stored in and packaged by a predetermined storage box (a wrapping box) with the packaging material. Thus, the object to be packaged can be protected from impact and vibration from outside of the storage box.

Especially, the packaging material comprises an opening portion to house a first accessory inside the packaging material, formed in one of the surfaces of the packaging material; and a notch-shaped concave portion to house a second accessory, formed in one of the angle portions of the packaging material. Thus, two kinds of objects which are the object to be packaged and the first accessory; two kinds of objects which are the object to be packaged and the second accessory; and three kinds of objects which are the object to be packaged, the first accessory, and the second accessory, can respectively be packaged together, by the packaging material.

That is to say, by the packaging material which comprises a stable structure, the object to be packaged, the first accessory, and the second accessory can respectively be packaged preferably. Thus, the packaging material can be used as one which can package two or more kinds of objects to be packaged preferably.

Preferably, the opening portion is formed by folding a surrounding end piece of an opening formed by cutting out a portion of the surfaces, toward an inside of the packaging material.

According to a third aspect of the preferred embodiment of the present invention, the opening portion of the packaging material is formed so that the surrounding end piece of an opening formed by cutting out a portion of one of the surfaces of the packaging material, is folded toward inside of the packaging material. Thus, the first accessory which is housed inside of the packaging material from the opening portion, is preferably guided inside the packaging material along the surrounding end piece folded toward inside, and the first accessory is retained by the surrounding end piece contacted to the surface of the first accessory. Therefore, the posture of the first accessory in the opening portion can be stabilized, and the object to be packaged such as the first accessory and the like can preferably be housed inside the packaging material.

Preferably, the notch-shaped concave portion is formed by concaving the one angle portion toward an inside.

According to a fourth aspect of the preferred embodiment of the present invention, the notch-shaped concave portion is formed so that one of the convex angle portions of the packaging material is concaved toward inside, and it is easy for the notch-shaped concave portion to be formed.

Especially, the packaging material comprises a plurality of angular cylindrical structures built up by folding the corrugated cardboard material, and has a stabled three-dimensional structure. Thus, the three-dimensional shape of the packaging material is to be preferably maintained.

Further, the space of the notch-shaped concave portion formed in the angle portion of the packaging material is preferably maintained with the three-dimensional shape of the packaging material, and the object to be packaged such as the second accessory can be housed in the notch-shaped concave portion so as to be protected.

The entire disclosure of Japanese Patent Application No. 2007-066861 filed on Mar. 15, 2007 including description, claims, drawings, and abstract are incorporated herein by reference in its entirety.

Although various exemplary embodiments have been shown and described, the invention is not limited to the embodiment shown. Therefore, the scope of the invention is intended to be limited solely by the scope of the claims that follow. 

1. A packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising: a fitting-in concave portion to fit a predetermined object to be packaged therein, the fitting-in concave portion being formed by being surrounded by the angular cylindrical structures; an opening portion to house a first accessory inside the packaging material, the opening portion being formed by folding a surrounding end piece of an opening formed by cutting out a portion of one surface of the packaging material, toward an inside of the packaging material; and a notch-shaped concave portion to house a second accessory, the notch-shaped concave portion being formed by concaving one of convex angle portions of the packaging material toward the inside.
 2. A packaging material having a plurality of angular cylindrical structures built up by folding a piece of a corrugated cardboard material, comprising: a fitting-in concave portion to fit a predetermined object to be packaged therein; an opening portion to house a first accessory inside the packaging material, the opening portion being formed in one surface of the packaging material; and a notch-shaped concave portion to house a second accessory, which is formed in one of angle portions of the packaging material.
 3. The packaging material of claim 2, wherein the opening portion is formed by folding a surrounding end piece of an opening formed by cutting out a portion of the surfaces, toward an inside of the packaging material.
 4. The packaging material of claim 2, wherein the notch-shaped concave portion is formed by concaving the one angle portion toward an inside. 